As others have said, some of stops, like LeHavre, are quite a distance from the city they link to.
You can choose what you want to do at those stops, planning ahead is key.
In 2019, we had a stop there and felt Paris was too far, but we were really interested in a D-Day tour. We booked a private tour with a few other couples from our cruise using NST - Normandy Sightseeing. They were able to customize it so we could visit Juno Beach, they also included the path one specific regiment followed as it was specific to one of the people in our group. It was one of the best days on our cruise. Saying that, the ship did offer D-Day tours as well, but we appreciated our customized itinerary.
So, look at where the port is, and choose what is doable for you.